WorkCentre Pro 421 User Guide A-13Appendix A - Safety NotesCanadian CertificationNotice: The Industry Canada Label on the machine identifiescertified equipment. This certification means that theequipment meets certain telecommunications networksprotective, operational and safety requirements. IndustryCanada does not guarantee the equipment will operate to theuser’s satisfaction.Before installing this equipment, users should ensure that it ispermissible to be connected to the facilities of the localtelecommunications company. The equipment must also beinstalled using an acceptable method of connection. In somecases, the company’s inside wiring associated with a singleline individual service may be extended by means of a certifiedconnector assembly (telephone extension cord).The customer should be aware that compliance with the aboveconditions may not prevent degradation of service in somesituations.Repairs to certified equipment should be made by anauthorized Canadian maintenance facility designated by thesupplier. Any repairs or alterations made by the user to thisequipment, or equipment malfunctions, may give thetelecommunications company cause to request the user todisconnect the equipment.Users should ensure for their own protection the electricalground connections of the power utility, telephone lines andinternal metallic water pipe system, if present, are connectedtogether. This precaution may be particularly important in ruralareas.CAUTION: Users should not attempt to make suchconnections themselves, but should contact theappropriate electric inspection authority or electrician, asappropriate.Notice: The Ringer Equivalence Number (REN) assigned toeach terminal device provides an indication of the maximumnumber of terminals allowed to be connected to a telephoneinterface. The termination on an interface may consist of anycombination of devices subject only to the requirement that thesum of the Ringer Equivalence Numbers of all the devicesdoes not exceed 5.
